APPENDIX F

AIR QUALITY

Past planning documents identified a “Chicago to Omaha” corridor, so for the purposes of this 

appendix, the corridor reference will remain as previously designated; however, the project name 

includes “Council Bluffs” in the title.
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Emission 

Factor[1],[4]

(g/gal)

(lb/gal) CO2

Emissions 

Added

(lb/yr)

Emissions 

Added

(ton/yr)

Emission 

Factor[2]

(g/mile)

(lb/gal) CO2

Emissions 

Diverted

(lb/yr)

Emissions 

Diverted

(ton/yr)

Emission 

Factor[3],[4]

(g/kg) 

(lb/gal) CO2

Emissions 

Diverted

(lb/yr)

Emissions 

Diverted

(ton/yr)

Emission 

Factor[2]

(g/mile)

(lb/gal) CO2

Emissions 

Diverted

(lb/yr)

Emissions 

Diverted

(ton/yr)

5.8 146,911 73.46 0.4272 245,782 122.89 0.7 1,129 0.56 0.1581 90,938 45.47 -95.47

38.1 965,054 482.53 3.3467 1,925,529 962.76 4.4 7,096 3.55 1.2706 731,020 365.51 -849.30

131 3,318,166 1,659.08 3.4469 1,983,165 991.58 14.1 22,739 11.37 1.2978 746,697 373.35 282.78

3.4 86,120 43.06 0.1698 97,702 48.85 0.0644 37,036 18.52 -24.31

3.298 83,537 41.77 0.1411 81,190 40.60 0.0545 31,384 15.69 -14.52

0.096 2,432 1.22 0.0071 4,093 2.05 0.4 645 0.32 0.0024 1,376 0.69 -1.84

22.377 257,326,517 128,663.26 17.681 212,216,475 106,108.24 21.098 5,149,656 2,575 22.377 71,608,494 35,804.25 -15,824.05

Quantity

1,294,000 AECOM Ridership Forecast 9/17/12

128,500 AECOM Ridership Forecast 9/17/12

 1,165,500 AECOM Ridership Forecast 9/17/12

78.9% 919,500 Passengers diverted to rail from auto

18.7% 218,500 Passengers diverted to rail from bus

2.4% 27,500 Passengers diverted to rail from air

473 miles - Google Earth Pro

60.3% Percenta

39.7% Percenta

 3,538 Btu/passenger mile

 3,663 Btu/passenger mile

1.55 passengers/vehiclea

1.84 passengers/vehiclea

 434,924,000 passenger-miles/year

 1,560,327 MMBtu/yr

130,000 Btu/gal - USEPA AP-42 Appendix A

12,002,515 gallons per year

261,209,725 miles per year

4,242 Btu/passenger mile

473 miles - Google Earth Pro

103,350,500 passenger-miles/year

438,413 MMBtu/yr

137,000 Btu/gal - USEPA AP-42 Appendix A

3,200,094 gallons per year

2,435 Btu/passenger mile

500 miles

647,000,000 passenger-miles/year

1,575,445 MMBtu/yr

137,000 Btu/gal - USEPA AP-42 Appendix A

11,499,599 gallons per year

2,826 Btu/passenger mile

424 miles - Google Earth Pro

11,660,000 passenger-miles/year

135,000 Btu/gala

6.60 lb/gal

32,951 MMBtu/yr

244,083 gal/yr

731,369 kg/yr

a

 US Department of Energy Transportation Energy Data Book: Edition 30-2011.

Automobile Emissions Diverted Airline Emissions Diverted Bus Emissions Diverted 

Net Change

(ton/yr)

Build Alternative Emission Calculations

Nitrogen oxides (NOx)

Carbon monoxide (CO)

Hydrocarbons

Pollutant

Additional passenger train emissions

Carbon dioxide[4] (CO2)

SO2

[5]

PM2.5

PM10

Amount of Diverted Trips

[1] Except CO2, emission factors from EPA document EPA420-F-09-025; Emission Factors for Locomotives; Dated April 2009. Emission factors are projected calendar year 2015 emission factors for 

passenger/commuter locomotives (Tier 4). 

[5] Train SO2 emission factor calculated based on 15 ppm (weight basis) diesel fuel sulfur content: (15 ppm S/1,000,000) x (7.05 lb/gal) x (454 g/lb) x (2 lb SO2/lb S) = 0.096 g/gal

Service C Source

Chicago to Omaha Intercity Passenger Rail Service - Estmate of Diverted Trips

Total Annual Ridership

New Trips from induced growth

Nationwide % passenger trucks

[2] Emission factors from data output from EPA Moves2010b model run for 2015. 

[3] Except CO2, emission factors from US Department of Transportation Federal Highway Administration document "Assessing the Effects of Freight Movement on Air Quality at the National and Regional Level; 

Final Report; April 2005". Emission factors are projected for 2015.

[4] CO2 Emission factors from US Department of Transportation Energy Information Administration Voluntary Reporting of Greenhouse Gases Program - Coefficients webpage. Emission factors are in units of 

lb/gal.

Auto

Auto miles one way

Nationwide % passenger cars

Auto Percent of Diverted Trips

Bus Percent of Diverted Trips

Air Percent of Diverted Trips

Average passenger car energy intensity

Average passenger truck energy intensity

Average passengers per car

Average passengers per truck

Total diverted auto passenger miles per year

Annual diverted auto fuel consumption

Total diverted bus passenger miles per year

Gasoline heating value

Annual auto fuel consumption diverted

Annual auto miles diverted

Bus

Intercity passenger bus energy intensitya

One-way distance

Total new train passenger miles per year

Annual diverted bus fuel consumption

Diesel fuel heating value

Annual diverted bus fuel consumption

Train

Intercity passenger train energy intensitya

One-way distance

Annual air fuel consumption diverted

Annual air fuel consumption diverted

Jet fuel heating value

Jet fuel density

Annual new passenger train fuel consumption

Diesel fuel heating value

Annual new passenger train fuel consumption

Annual air fuel consumption diverted

Air transportation energy intensitya

One-way distance

Total diverted air passenger miles per year

Air